药水的英文：
liquid medicine
lotion

参考例句：

Hair dye
染发药水

This kind of lotion for external use can eliminate dampness and relieve itching.
这种外用药水，燥涩止痒。

The druggist measured out a bottle of cough mixture according to the prescription.
药剂师根据处方量出一瓶止咳药水。

all-in-one solution for all soft contact lenses
全能隐形眼镜药水

This bottle of liquid medicine is for external application.
这瓶药水是外用的。

This lotion relieves itching.
这药水可止痒。

To circulate or apply(a medicine or solution)by gargling.
漱口的方式服(药片或药水)

I bought an all-in-one solution for all soft contact lenses.
我买了瓶全能隐形眼镜药水。

One of the night-duty nuns gave her a sleeping draught.
一个值夜班的修女给了她一剂安眠药水。

He contracted his brows and swallowed medicine down.
他皱了皱眉头，然后一口把药水喝了下去。

liquid是什么意思：
adj. 液体的；清澈的；明亮的；不稳定的
n. 液体，流体

The liquid is then diluted.
然后液体被稀释。

A small amount of liquid;a drop.
少量液体；一滴

soil or stain with a splashed liquid.
用溅出的液体弄脏或沾污。

medicine是什么意思：
n. 药；医学；内科；巫术
v. 用药物治疗；给…用药

There is no medicine to cure a fool || There is no medicine for curing a fool
笨人无药可医

Combine Chinese traditional medicine with western medicine
使中医与西医相结合。

The medicine is requested to pestle into powder.
这种药要研成粉末服用。

lotion是什么意思：
n. 润肤露，涂剂；外用药水

The lotion cools and refreshes the skin.
润肤液使皮肤凉爽清新。

rub lotion into one's skin
把护肤液擦进皮肤

To moisten and rub (a part of the body) with a liniment or lotion.
涂擦用涂抹油或洗液湿润或摩擦（身体的一部分）。